Because of contradictory data in the literature with regards to the efficiency of physiotherapeutic techniques to prevent and treat radiation-induced trismus, we believe there is a need to better investigate the efficiency and the quality of life resulting from the different prophylactic physiotherapeutic techniques for radiation-induced trismus in patients with HNC. After the conclusion of this research, we hope to suggest a suitable physiotherapeutic protocol to prevent this complication thereby allowing for an improvement in patients' quality of life.